Contact plug



yMamrnrzh 25 1930. A HD5 JONG ET AL CONTACT PLUG Filed May 3l, 1924fHaa,

Patented Mar. 25, 1930 UNITE-DX STATES PATENT OFFICE HENDRIK DE JONG,DIRK LELY, JR., AND RICHARD SHEPHERD, OF EINDHOVEN,

NETHERLANDS, ASSIGNORS T N. V. PHILIPS GLOEILAMPENFABRIEKEN, OF EIND-HOVEN f i CONTACT PLUG .Application led May 31, 1924, Serial No.716,996, and in the Netherlands .Tune 9, 1923.

As a rule the contact pins of pin-plugs are shaped as metal pegs with acircular crosssection and are provided with a saw-notch extending over acertain length ot the peg and disposed along the centre of the peg.

The manufacture of such contact pins has the disadvantage that it isdiiiicult to dispose the saw-notch exactly along the centre.

Furthermore the production of the sawnotch entails loss of material andthe contactpins often break ofi at the end ot the sawnoteh which hassharp angles.

The invention has for its particular object to improve the constructionof contact-pins i5 and their attachment in the insulating material.

According to the invention the contact-pins consist of two or moreresilient parts disposed against each other in the insulating material.-In a practical construction the two halves may have a semi-circularcross-sectlon, their iiat sides being arranged against each other theymay be disposed in the insulating mate-v rial separately from each otherin various i ways; Those ends of the halves which are lying within theinsulatingmaterial may be united, for example by shaping theaggregate ofthe contact-pin as a split-pin, the bent end of which is secured in theinsulating material.

For fixing the leading-in wire to a contactpin a metal member may bedisposed around the contact-pin adjacent that side of the 1nsulatingmaterial from which the contact pins'extend, and the leading-1n wire forthe said contact-pins may be led through a hole in the insulatingmaterial and a corresponding aperture in the metal member, theleading-in wire` being secured to the latter by soldering. The saidmetal member may consist y of an annular metal box disposed around thecontact-pin and having the leading-in wire iixed thereto by soldering.The metal member according to the invention may conslst of a metal rinto which the leading-in wire may be secure by means of solderingmaterial which lills the aperture through which the wire is led. Thesaid aperture may in this case break through the inner side ot the riig.5 ccording to the invention the metal memmaterial.

berlmay be embedded in the insulating mater1a The accompanying drawingdiagrammatically illustrates some constructions embodying the invention.In the said drawing:

Figure 1 is a View of a two-pin plug according to the invention.

Figui-e2 is a view partly in section of a pinplug according to theinvention, having differently constructed contact-pins and beingprovided with metal contact-boxes.

Figure 3 is a view of a third construction embodying the invention whichis also provided with contact-boxes.

Figure 4 is a side view, partly in section, of another modified form ofpin-plug,

Figure 5, is a plan view of the pin-plug shown in Figure Theconstruction shown in Figure 4 comprises contact pins31, 32, 33 and 34,which are executed as the pins shown in Figures 1, 2 and 3, and whichare fixed at their ends in insulating material 30. The attachment of theleading-in wire to the contact pins is clearly shown in detail at pin32.

The pin-plug shown in Figure 1 consists ot' a bottom 1 of insulatingmaterial, in which the contact-pins are secured by pressing aroundl themthe insulating material. One contact-pinconsists of two halves 2 and 3having a semi-circular section and being both provided at their lowerends with curved extremities v4 and 5, disposed in the insulating Theother contact-pin 6 consists also of two halves. A leading-in wire 8passes through anaperture 7 in the insulating material and is disposedaround a contact-pin, to which it may be fixed in any suitable manner,for example by soldering.

In the construction shown in Figure 2 contact-pins 11 and 12 have theshape of splitpins, the eyes of which are embedded in the insulatingmaterial. Around the contact-pins are disposed small metal boxes 13 and16, which serve for the attachment of leading-in wires 14 and 15. Asshown in the cross-sectional right half of the iigure, a leading-in,wire 15 passes through an aperture in the in- It is of course obviousthat in the first three j figures the two contact pins are illustratedas being turned 90 relatively to each other.

The construction shown in Figure 4 comprises contact-pins 31, 32, 33andv 34 which are executed asthe pins shown in Figure l,

'2 or 3 and whichv arexed at their ends in insulatingmaterial 30.' Theattachment of the leading-in wire to the contact-pinis clearly .shownian detail at the pin 32. The latter is surrounded by a metal ring 36which like the pin iscomposed of brass and is slidv .over thei'said pin.The ring has an aperture 37 corresponding with a hole ing material. Aleading-in wire 39 is led through the said holes and secured to the ring36 by reason of the hole 37 being filled with soldering material.Subsequent to the fixing operation the leading-in wire is cut above theyhole 37 and the Soldering material ofthe ring may be y'face,lfofrexample sov thatthe surface of theL wire Aof the ring with the nakedeye.

remaining above the hole is preferably removed. For this purpose theupper surface milled `off with a cutter, which ensures 'avery handsomefinish so that it is diiiicult to perceive the attachment ofvltle evringf36 is embedded in the insulating material and is provided with asmall flange 45 1n order to improve its attachment.` Obviously the ringmay be disposed in the material at amore orless great distance below,the surinsulating material land the surfaces ofthe rings fare at aleveThe position of the contact pins relative toeach'o'theris shown in"Figure 5.,v From is brokenuthrough'. lBy-.iilling this figure it isalso' clear that the hole 37 in thering 36 is disposed quite closely tothe contact-,pin 32 so that the inner wall ofthe ring the hole 37 withsoldering material, the ring, the wire and the pin are rigidly securedto each other and al good electric contact is obtained. The hole 37 maybefrlisposed in a somewhat inclined direction so that the inner wall ofthe ring is brokenl throu h at 4.a lower part.

1. An electric contact plug havingcontact pins consisting of Atwo ormore resilient solid parts disposedlagainst each other, the ends of saidparts'being material and joined together `forming a ring at thepoint ofjoining. j

2. An electric contact plug having con- 38 in the'insulatembedded in theinsulatingA tact pins consisting of twovor more resilient solid partsdisposed against each other, the

ends of said parts being embedded in the insulating material and joinedtogether forming a ring at the point of joining, and a metal memberdisposed around one or more contact pins adjacent that part of theinsulatngdmaterial from whichthe contact pins ex- 3. An electric contactplug having contact pins consisting of two or more resilient solid partsdisposed against each other and embedded at their endsvdirectly into theinsulating material, and an annular metal box disposed around one ormore of the contact pins.

4. An electric contact plug having contact pins consisting of two ormore solid parts disposed against each other, the ends of said partsbeing embedded. in the insulating material and joined together forming aring at the point of joining, and an annular metal box disposed around ceach of the Contact pms. I l' 5. An electric contact plug having contact-pins consisting of two or .more resilient solid parts disposed againsteach other, the ends of said parts being embedded in the insulatingmaterial and joined together forming a ring at the point of joining,anda metal ring disposed around thecontact pins and embedded in theinsulating material.

6. An electric contact plug having contact n pins consisting of two ormore resilient solid parts disposed against each other, the ends ofwhich are-embedded directly into the insulating material, a metal memberdisposed* around one or more .contact pins, and'aleadlng-in wire foreach of said contact pins led through a hole in the insulating materialand a corresponding aperture in the metal member, the leading-.in wirebeing lixedto the said parts being embedded in the insulating.

material and joined together forming a ring at 'the point` of joining,la metal box disposed around the contact pins, and a leadingin wirefixed thereto by soldering.

9'.' An electric contact plug having contact pins consisting of two ormore resilient solid parts disposed against `each other andeml edded atthelr ends directly into insulatf ing material, and a metal boX disposedaround one or more of the contact pins.

10. An electric contact plug having contact pins consisting of two ormore resilient solid parts disposed against each other and embedded attheir ends directly into the insulating material, and a metal boxdisposed around one or more contact pins adJacent that side of theinsulating material from which the contact pins extend. v

11. An electric'contact plug having contact pins consisting of two ormore resilient solid parts disposed against each other, the ends 'ofsaid parts being embedded directly in the insulating material and boundtogether to form a ring atl the point of joining,

and a metal ring disposed around one or more of the contact pins. l

12. An. electric contact plug havmg contact pins consisting 'of two ormore resilient solid parts disposed against each other and embedded attheir ends directly into the insulatl ing material, and a metal boxdisposed around one or more of the Contact pins and embedded in theinsulating material.

In testimony whereof we ailX our signatures.

VHENDRIK DE JONG. DIRK LELY, JR.

RICHARD SHEPHERD.

